1. Salt gradient stabilized solar pond collector
2. and (1984). ‘Performance of green-house coupled biogas plants in winter months of Northern India’, Proc. World Bio-Energy Conference and Exhibition, Gothenburg, Sweden, 14–19 June.
3. and (1980). ‘Solar Engineering of Thermal Processes,’ Wiley, New York.
4. Solar energy heating of dairy-manure anaerobic digesters
5. , and (1981). Solar Distillation, Pergamon Press Ltd., New York.